When I go to try the code samples, none of the relevant classes seem to exist. I am referencing Syncfusion.Core, SyncFusion.Pdf.Base and SyncFusion.Pdf.Web in my project, and am using Essential Studio Edition 2009 Volume 1 (V7.1.0.21). I can't find anything to tell me which version the barcoding was introduced in, or what references I need. Can anyone help?